Latent heat storage using sodium acetate trihydrate is a promising heat storage technology for distributed building heating. However, the industrial and economic feasibility of this heat storage technology has not been proven yet. This work comprehensively carried out industrialization-oriented investigations on this technology from multi-level aspects of (i) thermal characterization and life-cycle assessment of industrial-grade storage materials, (ii) thermal design and performance evaluation of practical-scale heat storage equipment, and (iii) system integration and economic analysis of a practical heating project. The results indicate that the industrial-grade modified storage medium is of similar heat storage and transfer capability but a much lower cost, compared with the analytical reagent. However, it suffers from a more serious attenuation (7.3% vs. 4.9% after 300 cycles) in total heat storage capacity. The developed latent heat storage reservoir can perform stable charges and discharges, with a 24-h thermal loss of around 3.5%. The averaged storage thermal efficiency, total efficiency and specific operational cost of the electric-powered demonstration heating system within a 22-day continuous operation are 96.5%, 90.0% and 0.371 RMB (5.2 cents) kWh⁻¹, respectively. The results prove a great application potential of latent heat storage using salt hydrates for the heat dispatch of distributed building heating.

使用三水合乙酸钠的潜热蓄热技术是用于建筑物分布式供热的一种有前途的蓄热技术。但是，这种储热技术的工业和经济可行性尚未得到证实。这项工作从（i）工业级存储材料的热特性和生命周期评估，（ii）实用规模的储热设备的热设计和性能评估的多个层面全面地对该技术进行了面向工业化的研究。 （iii）实际供热项目的系统集成和经济分析。结果表明，与分析试剂相比，工业级改性存储介质具有类似的储热和传热能力，但成本低得多。然而，它的总储热能力会遭受更严重的衰减（300次循环后为7.3％对4.9％）。发达的潜热储罐可以进行稳定的充放电，24小时的热损失约为3.5％。连续22天连续运行的电力示范供暖系统的平均储热效率，总效率和特定运行成本分别为96.5％，90.0％和0.371元（5.2美分）kWh^-1。结果证明了使用盐水合物的潜热蓄热在建筑物集中供热中的巨大应用潜力。